Edessa was an ancient city in Upper Mesopotamia, in what is now Urfa or Şanlıurfa, Turkey. It was founded during the Hellenistic period by Macedonian general and self proclaimed king Seleucus I Nicato
The heritage of Roman Edessa survives today in these columns at the site of Urfa Castle, dominating the skyline of the modern city of Urfa.
Silver tetradrachm struck in Edessa by Macrinus 217–218 AD
King Abgar holding the Image of Edessa.
The seizure of Edessa in Syria by the Byzantine army and the Arabic counterattack (Maniakes) from the Chronicle of John Skylitzes.jpg
According to Eastern Christian tradition, Addai of Edessa or Thaddeus of Edessa was one of the seventy disciples of Jesus.
Icon of St. Thaddeus (10th century, Saint Catherine's Monastery, Mount Sinai)
Abgar receiving the Mandylion from Addai (encaustic icon, Saint Catherine's Monastery, Mount Sinai).
Christ Pantocrator mosaic from Hagia Sophia 2744 x 2900 pixels 3.1 MB